What’s Vulnerable › Vulnerabilities

CVE-2026-8806: Denial-of-service (DoS) vulnerability in MELSEC iQ-F Series FX5-ENET/IP Ethernet module

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-19 · updated 2026-10-26
• Weakness: CWE-440

Description

Expected Behavior Violation vulnerability in Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP all versions allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by continuously sending a large number of communication packets to the Ethernet port of the product in a short period of time, increasing the processing load of the product, preventing the internal anomaly-detection processing from being performed, and causing the communication function to stop.

Affected products

• Mitsubishi Electric Corporation Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP: all versions

References

• https://jvn.jp/vu/JVNVU97140216/
• https://www.cisa.gov/news-events/ics-advisories/icsa-26-169-06
• https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-003_en.pdf

Get alerted when CVE-2026-8806 or the next vulnerability affects your stack